A lament on migration in Colombia to mark the UN's international day of older persons – audio slideshow

Civil conflict lasting more than half a century has destroyed livelihoods in the Montes de María area of northern Colombia, prompting the region's youth to migrate to cities. Photographer Antonio Olmos travelled there with
HelpAge International to document the lives of the older generation; here, his pictures are set to a song, 'Manjupan', written by village leader Ramon in honour of the UN's
international day of older persons